Gradation Variability of Asphalt Mixture in Construction Process

CICTP 2019 ◽  
2019 ◽  
Author(s):  
Fan Ding ◽  
Yanshun Jia ◽  
Ying Gao
Keyword(s):  
Asphalt Mixture ◽  
Construction Process

The Study on Foaming Characteristics of Foamed Asphalt in Cold Recycling Technology

2011 ◽  
Vol 243-249 ◽  
pp. 4293-4296
Author(s):  
Jing Li Liu ◽  
Lian Yu Wei ◽  
Guo Qiang Zhang
Keyword(s):  
Quality Control ◽  
Theoretical Basis ◽  
Asphalt Mixture ◽  
Construction Process ◽  
Environment Protection ◽  
Effect Evaluation ◽  
Construction Period ◽  
Foamed Asphalt ◽  
Recycling Technology ◽  
Cold Recycling

Through the foaming mechanism and foaming effect evaluation, this paper analyzes the production procedure, optimum content and strength of foamed asphalt mixture thoroughly. Combined with the construction process quality control and inspection and acceptance criteria, this paper provides data for reference and theoretical basis for application of cold recycled technology of foamed asphalt to pavement project. Its construction without disrupting traffic, thus shorten the construction period and improve efficiency, which also have advantages such as energy conservation, environment protection and economy. Above all, it is beneficial to foamed asphalt′s popularization and application.

Analyse the Influence Factors of Energy-Saving and Emission-Reduction in Asphalt Pavement Construction

2013 ◽  
Vol 774-776 ◽  
pp. 913-918
Author(s):  
Li Du ◽  
Yu Mei Li ◽  
Cong Hao Li
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Emission Reduction ◽  
Heating Temperature ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Influence Factors ◽  
Construction Process ◽  
Construction Machinery ◽  
Pavement Construction

Base on the process of asphalt pavement construction, analyse the influence factors of energy-saving and emission-reduction in asphalt pavement construction. Research shows thatduring the asphalt pavement construction process, all kinds of construction machinery are the main source of energy consumption and emissions; Asphalt mixture also emission part of gases itself, which closely related with the heating temperature of the mixture.

scholarly journals Determination and Monitoring of Key Construction Control Indices for Low-Temperature Performance of Asphalt Mixtures Based on BIM Platform

2021 ◽  
Vol 2021 ◽  
pp. 1-20
Author(s):  
Yulong Zhao ◽  
Ying Gao ◽  
Ke Zhang ◽  
Yao Zhang ◽  
Mingce Yu
Keyword(s):  
Low Temperature ◽  
Asphalt Mixture ◽  
Strain Energy Release ◽  
Asphalt Mixtures ◽  
Information Modeling ◽  
Construction Control ◽  
Construction Process ◽  
Factors Affecting ◽  
Temperature Performance ◽  
Low Temperature Performance

The construction control indices were commonly used to ensure the quality of asphalt layers in the construction process. However, the relationship between the construction control indices and the low-temperature performance of asphalt layers is not clear. The purpose of this paper was to investigate the effect of the variations of the construction control indices on the low-temperature performance of asphalt mixtures to determine the key construction control indices, and propose the method for the monitoring of these indices using the Building Information Modeling (BIM) platform. The low-temperature performance of asphalt mixtures was evaluated by the semicircular bend (SCB) test. A new prediction model of critical strain energy release rate was established to evaluate the low-temperature performance of the asphalt layer. Five factors are considered for the low-temperature performance, which are the gradation and asphalt-aggregate ratio in the asphalt mixture plant, rolling temperature, gradation segregation, and temperature segregation. Orthogonal test (OT) results indicated that the order of importance of factors affecting the low-temperature performance is asphalt-stone ratio, gradation, and molding temperature. The influences of gradation segregation and temperature segregation on the low-temperature performance were quantified in this study. Furthermore, the construction control indices were monitored by the BIM platform developed in this research. In the construction process of the asphalt layer, the gradation variation caused by the segregation should be paid more attention to ensure the low-temperature performance of the pavement.

Analysis on the Reliability of Asphalt Pavement

2011 ◽  
Vol 243-249 ◽  
pp. 4147-4151 ◽  
Author(s):  
Qing Guo Yang ◽  
Li Yan Dong ◽  
Jin Cheng Ning
Keyword(s):  
Early Stage ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Early Period ◽  
Asphalt Pavements ◽  
Design Parameters ◽  
Construction Process ◽  
Actual Material ◽  
Pavement Damage

The asphalt pavements which are designed for 15-years usage are often highly damaged in the early period. In order to eliminate this phenomenon, researches have been carried out in many aspects, but the situation of asphalt pavement damage cannot be essentially changed. In the view of reliability, the frequent early stage damage phenomenon of asphalt pavements means that nowadays process of asphalt pavements must have not sufficient reliability, and just it leads the asphalt pavements can not reach the design purpose. Based on the basic engineering reliability theory, the reliability of the asphalt pavement design, from the determination of effect actions to selection of material parameters and the calculative model about pavement, has been analyzed; meanwhile the reliability of construction process has been analyzed too. The analysis on the reliability of asphalt pavement shows that the determination of design parameters makes the actual material is weaker than design; the construction process of the asphalt pavement makes the asphalt mixture greatly different anticipations and makes the layer condition deviated the ideal bonding condition. It is just these various uncertainties in design and construction that causes the asphalt pavement damage in early stage. So in order to change the situation of early damage in asphalt pavement, the effective measures are to focus on the reliability of design and constructions.

Methods for Reducing Energy Consumption and Carbon Emission in Asphalt Pavement Construction

2013 ◽  
Vol 361-363 ◽  
pp. 1825-1828
Author(s):  
Zhi Yong Ding ◽  
Yi Xiao Yang
Keyword(s):  
Energy Conservation ◽  
Emission Reduction ◽  
Carbon Emission ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Construction Process ◽  
Consumption Reduction ◽  
Structure Improvement ◽  
Excellent Control ◽  
Pavement Construction

In the construction process of asphalt pavement, mixing is the process which brings most of carbon emission. There is huge potential advancement of energy conservation, emission reduction and consumption reduction in the construction of asphalt pavement. Research on the structure improvement of construction equipment, the optimizing of the construction technological process and the influence of mixture performance and parameters is necessary. It is feasible to conduct interdisciplinary research in the condition that construction quality is ensured. There needs excellent control technology on efficient paving, efficient compaction and appropriate equipment match and temperature segregation of mixture. By doing this, the purpose of energy conservation and emission reduction in the construction process of hot-mix asphalt mixture can be achieved.

scholarly journals RPAS BASED TRACKING OF MACHINERY USED IN ASPHALT PAVING PROCESS

2021 ◽  
Vol XLIII-B1-2021 ◽  
pp. 197-201
Author(s):  
G. Staub ◽  
H. Montecino ◽  
J. E. Díaz ◽  
M. Pradena ◽  
S. Miller ◽  
...  
Keyword(s):  
Asphalt Mixture ◽  
Construction Materials ◽  
Road Construction ◽  
Construction Process ◽  
The Road ◽  
Remotely Piloted Aircraft ◽  
Asphalt Paving ◽  
Pavement Construction ◽  
Main Factor

Abstract. Application of rigorous construction procedures is fundamental when it comes to road construction. Nowadays, and in particular in Chile, the asphalt paving construction process is based on tradition, craftsmanship and other implicit, experience-based methods employed during road construction. This means, that the different stages of the construction process, including the paving of the road, are not controlled on time as they should, which causes that the final product does not have the ideal characteristics for which the construction materials initially were designed and manufactured. Therefore, we propose the use of tools and methodologies that allow monitoring each of the stages of the construction process in almost real-time. Our approach aims to evaluate the use of Remotely Piloted Aircraft Systems (RPAS) during the asphalt pavement construction process by capturing images and videos during the placement of the asphalt mixture and the movement of the compaction machinery (pneumatic roller and drum roller) present in the construction site. The observations are digitally processed by mainly binarization and thresholding. As a result, the macro texture of the asphalt surface was estimated and the trajectory of the compaction rollers was visualized. In conclusion, our results reveal that the main factor that influences the quality of the roads corresponds to the performance and operations of the compaction machinery.

Achieving Asphalt Pavement Density with Minimal Mat Defects

2021 ◽  
pp. 036119812110200
Author(s):  
Adam J. T. Hand ◽  
Timothy Aschenbrener ◽  
Nam Tran ◽  
Fabricio Leiva
Keyword(s):  
Service Life ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Pavement Performance ◽  
Construction Process ◽  
Compaction Processes ◽  
Departments Of Transportation

It is well established that in-place density significantly influences asphalt pavement performance and service life. This paper discusses solutions to challenges that agencies and contractors often face when trying to achieve density requirements, or increase density, while eliminating compaction-related mat defects during the construction process. The basics of the asphalt pavement compaction processes, equipment, operations, and asphalt mixture densification are first presented, followed by information collected on a series of FHWA sponsored departments of transportation (DOTs) density demonstration projects. The authors then summarize the root causes associated with challenges in obtaining the desired density without compaction-related mat defects in a series of categories based on the DOT demonstration projects and experience assisting contractors with obtaining density on hundreds of projects. Examples are described for each category along with potential opportunities for improvements to overcome them. The demonstration projects illustrated that it is possible to make improvements when agencies and contractors embrace the idea of increasing density and reducing mat defects.

scholarly journals Establishment of Rutting Model of Wheel-Tracking Test for Real-Time Prediction of Rut Depth of Asphalt Layers

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Yulong Zhao ◽  
Ying Gao ◽  
Ke Zhang ◽  
Yao Zhang ◽  
Mingce Yu
Keyword(s):  
High Temperature ◽  
Real Time ◽  
Asphalt Mixture ◽  
Construction Process ◽  
Molding Temperature ◽  
Time Prediction ◽  
Temperature Performance ◽  
Comparison Results ◽  
Wheel Tracking Test ◽  
Wheel Tracking

The construction process control of asphalt layers directly affects the road service life and quality. The objective of this study was to establish a rutting model of the wheel-tracking test used for the real-time prediction of the rut depth of asphalt layers in the construction process. The gradation of asphalt mixture, asphalt content, and molding temperature were considered in the development of the new rutting model of the wheel-tracking test. The effects of these three factors on the high-temperature performance of asphalt mixture were analyzed. The order of importance of the factors affecting the high-temperature performance of asphalt mixture is the gradation of asphalt mixture, asphalt-aggregate ratio, and molding temperature. Overall, the predicted values of the rut depth of the wheel-tracking test are very close to the measured values. Furthermore, the difference between the rut depths of asphalt layers of the test group and the control group is small. These comparison results indicate that the new rutting model of the wheel-tracking test has high accuracy and good applicability for the test road.

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